K
Karim Rezai
Researcher at University of Iowa
Publications - 44
Citations - 4500
Karim Rezai is an academic researcher from University of Iowa. The author has contributed to research in topics: Cerebral blood flow & Scintigraphy. The author has an hindex of 24, co-authored 44 publications receiving 4414 citations. Previous affiliations of Karim Rezai include University of Iowa Hospitals and Clinics.
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Journal ArticleDOI
Hypofrontality in neuroleptic-naive patients and in patients with chronic schizophrenia. Assessment with xenon 133 single-photon emission computed tomography and the Tower of London.
Nancy C. Andreasen,Karim Rezai,Randall Alliger,Victor W. Swayze,Michael Flaum,Peter T. Kirchner,Gregg Cohen,Daniel S. O'Leary +7 more
TL;DR: The results suggest that hypofrontality is related to negative symptoms and is not a long-term effect of neuroleptic treatment or of chronicity of illness.
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Schizophrenia and cognitive dysmetria: a positron-emission tomography study of dysfunctional prefrontal-thalamic-cerebellar circuitry.
Nancy C. Andreasen,Daniel S. O'Leary,Ted Cizadlo,Stephan Arndt,Karim Rezai,Laura L. Boles Ponto,G. L. Watkins,Richard D. Hichwa +7 more
TL;DR: Results support a role for the cerebellum in cognitive functions and suggest that patients with schizophrenia may suffer from a "cognitive dysmetria" due to dysfunctional prefrontal-thalamic-cerebellar circuitry.
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Remembering the past: two facets of episodic memory explored with positron emission tomography.
Nancy C. Andreasen,Daniel S. O'Leary,Ted Cizadlo,Stephan Arndt,Karim Rezai,G. L. Watkins,Laura L. Boles Ponto,Richard D. Hichwa +7 more
TL;DR: Results indicate that free-ranging mental activity (random episodic memory) produces large activations in association cortex and may reflect both active retrieval of past experiences and planning of future experiences, and which permit human beings to experience personal identity, consciousness, and self-awareness.
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Image processing for the study of brain structure and function: problems and programs.
Nancy C. Andreasen,Gregg Cohen,Greg Harris,Ted Cizadlo,Jussi Parkkinen,Karim Rezai,V W Swayze nd +6 more
TL;DR: A group of software programs are described designed to provide a comprehensive solution for fundamental problems in the analysis of functional and structural imaging data, including data transport, boundary identification, and tissue segmentation.
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Short-term and long-term verbal memory: a positron emission tomography study.
Nancy C. Andreasen,Daniel S. O'Leary,Stephan Arndt,Ted Cizadlo,Richard R. Hurtig,Karim Rezai,G. L. Watkins,Laura L. Boles Ponto,Richard D. Hichwa +8 more
TL;DR: In this article, the authors compared short-term and long-term recall of experimentally presented words by the [15O]H2O method with positron emission tomography (PET) in a sample of 33 healthy normal volunteers.